The Effect of CO2 on Pyrite Transformation

Wei Zhi Lv; Dun Xi Yu; Lan Lan He; Jian Qun Wu; Ming Hou Xu

doi:10.4028/www.scientific.net/AMR.724-725.1301

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 724-725The Effect of CO2 on Pyrite Transformation

The Effect of CO₂ on Pyrite Transformation

Abstract:

Pyrite was heat treated on a thermo-gravimetric reactor (TGR) and a drop tube furnace (DTF) in CO₂/N₂ mixtures with different CO₂ concentrations. The effects of CO₂ on pyrite transformation were investigated. The reaction products were characterized by XRD and XRF. The results show that, the presence of CO₂ can promote pyrite desulfurization and oxidation at 900°C and 1500°C. Pyrite oxidation seems to increase with CO₂ concentration. TGR results show that hematite and magnetite are the final iron products at 900°C and higher CO₂concentration. DTF reaction samples generated at 1500°C with the presence of CO₂ contain pyrrhotite and magnetite, indicating incompletion of pyrite desulfurization/oxidization due to a short residence time.

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Periodical:

Advanced Materials Research (Volumes 724-725)

Pages:

1301-1305

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.724-725.1301

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Online since:

August 2013

Authors:

Wei Zhi Lv*, Dun Xi Yu, Lan Lan He, Jian Qun Wu, Ming Hou Xu

Keywords:

CO₂, Coal Combustion, Effect, Oxy-Fuel Combustion, Pyrite Transformation

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